PSLE Jen has a number of pens in three colours: red, yellow and brown.
14 of the pens are red. The number of red pens is twice the number of yellow pens. What fraction of the pens is brown?
Red |
Yellow |
Brown |
Total |
1x2 |
3x2 |
4x2 |
2x1 |
1x1 |
|
|
2 u |
1 u |
5 u |
8 u |
Number of red pens is the repeated identity.
Make the number of red pens the same.
LCM of 1 and 2 = 2
Number of brown pens
= 8 u - 2 u - 1 u
= 5 u
Fraction of the pens that is brown
=
58 Answer(s):
58